Method of producing a puncture-closing compound for pneumatic tires.



Y rubber or y and salt; 1

entran enanas Parana onirica.,

A RANDALL VAN VALKENBURG', OF RUSBVILLE, INDIANA, ASSIGNOR T0 J. N. NEAL,

OF MANISTEE, MICHIGAN.

METHOD 0.`E' PRODUING A. lUNC-URE-CLOSING COMPOUND FOR. PNEUMATIC TIRES. i

No Drawing.

To all whom it may concern:

Be it known that I, RANDALL T. VAN VAL- KENBURG, a citizen of the United States, residing at Rushville, in the county of Rush State of Indiana, have invented certain new and useful Improvements in Methods of Tires; and Ido declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the -art to which it appei'tais to make and use the same.

-Th-is invention relates to a method of producinga compound for closing leakages in rubber articles such as pneumatic tires whether arising from the porosity of the from punctures.

The object of the invention is to provide a method of producing a compound of this character which when constructed in accordance therewith will keep the fibers equally distributed at all times, thereby preventing 'balling of the fibers within the -inner tube of a tire.

In carrying out this invention, the following ingredients in theproportions specified are thoroughly commingled be tion tov the tube, to wit: 42 pounds of asbestos; 5% pounds of alaba-Stine, which is the equivalent of four pounds of Whiting and one pound of plaster of Paris; 2 pounds of flour; l' pounds of corn meal; 10 pounds of pound of pulverized charcoal; 1 pound of iron oXid, and pounds of water.

All of the ingredients except the flour and meal are first thoroughly then cooked by subjecting them to 235 degrees Fahrenheit which greatly assists the commingling of the'ingredients and causes the vasbestos to become thread-like' and Iprevents the fibers thereof from bunching or balling up suchas frequently occurs when raw materials* are employed. After they have been cooked to 'the' desired thickness enough 11qu1d is removed and combined with the flour and corn meal to make a thin paste, and this paste is then added to the mixture while boiling and thoroughly agitated whereby t e flour and meal lis Specification of Letters Patent. Application mea November 2a,

Producing a Puncture-Closing rComy pound for Pneumatic mixed and are Patented lunas i5, li. 191s. serial No. scarce,

thoroughly mixed withi dients and the cooking thereof renders them adhesive which Quality is imparted 'to the entire composition. n

The asbestos employed provides fibers .dun and condition rThis compound, after being prepared as above set forth, is applied to-the inner face of the inner tube of the tire and forms a viscid coating which closes the pores of the ber, and in case of aA puncture forms a p ug. This compound maybe introduced into a tire through the valve tube or otherwise in a quantity suicient tothoroughly cover the interior wall at all portions, and it may be distributed by whirling the tire `or in the ordinary rotatlon thereof while on a 4whee as ensues when riding. It will close any 'reasonable puncture owing to the fact that the passage of the air fromvthe tire throng the puncture produces, suction which draws the asbestos fibers` into the openingr and closes thesame air tight.

claim as my invention 'A method of producing a leair ciosing compound for tires which consistein mixing asbestos, alabastine, salt, pulverized char coal, iron oxid, and water; thensubj'ecting. 85

them to 235o Fahrenheit and Cookin them meal nesses.

RANDALL T. VAN VALKENBURG. Witnesses: i

a. s. smeg, M. N.

the other ingre- Eo 

